gvSIG projects pool

package org.gvsig.report.lib.impl.reportbuilder;

import ar.com.fdvs.dj.domain.CustomExpression;

import java.util.Map;

import java.util.Objects;

import net.sf.jasperreports.engine.fill.JRFillField;

import org.gvsig.expressionevaluator.Expression;

import org.gvsig.expressionevaluator.ExpressionUtils;

import org.gvsig.expressionevaluator.MutableSymbolTable;

import org.gvsig.fmap.dal.expressionevaluator.FeatureSymbolTable;

import org.gvsig.report.lib.impl.JRFeatureStoreDataSource;

import org.gvsig.tools.dataTypes.DataType;

import org.gvsig.tools.util.CachedValue;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

/**

 *

 * @author osc

 */

public class GvsigCustomExpression implements CustomExpression {

    private static final Logger LOGGER = LoggerFactory.getLogger(GvsigCustomExpression.class);

    public final Expression expression;

    private final DataType dataType;

    private final MutableSymbolTable symbolTable;

    GvsigCustomExpression(Expression exp, DataType dataType) {

        this.expression = exp;

        this.dataType = dataType;

        this.symbolTable = ExpressionUtils.createSymbolTable();

    }

    @Override

    public Object evaluate(Map fields, Map variables, Map parameters) {

        Object o = null;

        Map<String, Object> fieldsVars = (Map<String, Object>) fields;

        for (Map.Entry<String, Object> var : fieldsVars.entrySet()) {

            o = var.getValue();

            if( o instanceof JRFillField) {

                JRFillField value = (JRFillField) o;

                symbolTable.setVar(var.getKey(), value.getValue());

            }

        }

        o = parameters.get("REPORT_DATA_SOURCE");

        if( o instanceof JRFeatureStoreDataSource ) {

            JRFeatureStoreDataSource dataSource = (JRFeatureStoreDataSource) o;

            FeatureSymbolTable fst = dataSource.getFeatureSymbolTable();

            symbolTable.addSymbolTable(fst);

            LOGGER.info(Objects.toString(fst.getFeature()));

        }

        return expression.execute(symbolTable);

    }

    @Override

    public String getClassName() {

        return dataType.getDefaultClass().getName();

    }

}